You should try the following books:
1. "Aircraft Flight Control Actuation System Design", by Raymond, E.T., Chenoweth, C.C.; ISSN: 1-56091-376-2
2. "Aircraft Systems: Mechanical, Electrical and Avionics Subsystems Integration", by Moir, I., Seabridge A.; ISSN: 1-56347-506-5
These are excellent books not only for introduction. Furthermore they offer you cross reference to special literature.
regards Kasper